solve for x
cos^2 30 + sin^2 2x = 1
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Answered by
5
Heya user !!!
Here's the answer you are looking for
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Here's the answer you are looking for
Please see the attached file for your answer ☺️
★★ HOPE THAT HELPS ☺️ ★★
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AvniSahu:
thanks for solving but the answer is wrong. answer provided at the back of the book is 15°. we had to find the value of x°
π/12 is 15° dear
in place of x i have written theta...
oh im so sorry, i just started trignometry and im confused
hope u understood now
yes, thank you
yeah its ok... π rad = 180° so π/12 becomes 15°
Okay
Answered by
7
cos^230° +sin^22x=1
(√3/2)^2+sin^22x=1
3/4+sin^22x=1
3+sin^22x=4*1
sin^22x=4-3
sin^22x=1
sin2x=1
sinx=1/2
but sin30°=1/2
sinx=sin30°
x=30°
(√3/2)^2+sin^22x=1
3/4+sin^22x=1
3+sin^22x=4*1
sin^22x=4-3
sin^22x=1
sin2x=1
sinx=1/2
but sin30°=1/2
sinx=sin30°
x=30°
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