Question

5 cos square 60 + 4 sec square 30 minus 10 square 45 upon sin square 30 + cos square 60​

Answer 1

ANSWER

sin230+cos2305cos260+4sec230−tan245

⇒(21)2+(23)25(21)2+4(32)2−(1)2

⇒41+4345+316−1

⇒4445+316−1

⇒123+64=1267.