Question

if sin theta =144/145 find cos theta​

Answer 1

Answer:

cos ∅= 17/145

Step-by-step explanation:

sin∅ = 144/145

now, sin∅ =P/H

means P=144,H=145

then cos∅ =B/H

using pythagoras theorem

H²= B²+ P²

(145)² = B² +(144)²

21025 =B²+20736

21025 -20736=B²

289 =B²

√289 =B

17=B

B=17

cos∅

=17/145 ( B/H)

Answer 2

Answer:

17/145

Step-by-step explanation:

Solution

sin²thetha + cos²thetha =1

: . [144/145]²+cos²thetha =1

: . cos²thetha =1-[20736/21025]

: . cos²thetha =[289/21025]

: . cos thetha =[17/145]

.