&line2=\mathrm{Solution:\:}\frac{7\sqrt{2}}{4} "3.5cos(45) - Symbolab")
3.5cos(45) - Symbolab
\cdot%20\cos(30^{\circ%20})%2B\sin(45^{\circ%20})\cdot%20\sin(60^{\circ%20})}{\tan(30^{\circ%20})\cdot%20\tan(60^{\circ%20})}&line2=\mathrm{Solution:\:}\sqrt{\frac{3}{2}} "cos(45)*cos(30)+sin(45)*sin(60))/(tan(30)*tan(60)) - Symbolab")
cos(45)*cos(30)+sin(45)*sin(60))/(tan(30)*tan(60)) - Symbolab
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What equation/process do you need to know to find the exact value of trig expressions such as sin 45 + cos 60, my teacher only lectures and doesn't let us practice in
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Prove that cos (45^∘ - A) cos (45^∘ - B) - sin (45^∘ - A) sin (45^∘ - B) = sin (A + B) .
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![Find the value of x, if \\[\\tan 3x=\\sin 45.\\cos 45+\\sin 30\\].](https://www.vedantu.com/question-sets/96cc2e0d-cf59-4a61-ad15-ab6fe2692ba43818688285923081826.png "Find the value of x, if \\[\\tan 3x=\\sin 45.\\cos 45+\\sin 30\\].")
Find the value of x, if \\[\\tan 3x=\\sin 45.\\cos 45+\\sin 30\\].
