sin2sin square theta + cos square theta is equal to 1
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to prove sin²Φ+cos²Φ=1
we know sinΦ =P/H and cos Φ =B/H
now acc. to question
(P/H)²+(B/H)²=1
P²/H²+B²/H²=1
(P²+B²)/H²=1 P² +B² =H²
this is according to pythogrous theorem of right triangle
we know sinΦ =P/H and cos Φ =B/H
now acc. to question
(P/H)²+(B/H)²=1
P²/H²+B²/H²=1
(P²+B²)/H²=1 P² +B² =H²
this is according to pythogrous theorem of right triangle
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