Mathematics
Senior High
解説お願いします！！問3と問4両方です！
3 次の式の値を求めよ。
sinOtane
1
(1) 1+ cose (1-sine)(1+sine)
9
(2) (cos100°−cos170°)² + (sin80° + cos80°)2
4 次の式の取りうる値の範囲を求めよ。
(1) 3cos0 - 1 (0 ≤ 0 ≤ 180°)
(2) −2sin0+3 (30° ≤ 0 ≤ 120°)
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